C:Users ame>pip Usage: pip <command> [options] Commands: install Install packages. download Download packages. uninstall Uninstall packages. freeze Output installed packages in requirements format. list List installed packages. show Show information about installed packages. check Verify installed packages have compatible dependencies. …… from selenium import webdriver driver = webdriver.Firefox() #访问百度首页 first_url= 'http://www.baidu.com' print("now access %s" %(first_url)) driver.get(first_url) #访问新闻页面 second_url='http://news.baidu.com' print("now access %s" %(second_url)) driver.get(second_url) #返回(后退)到百度首页 print("back to %s "%(first_url)) driver.back() #前进到新闻页 print("forward to %s"%(second_url)) driver.forward() driver.quit()
info={
'egon':{'pwd':'123','hobbies':['play','music','read']},
'alex':{'pwd':'1234','hobbies':['music','read']},
'wupeiqi':{'pwd':'135','hobbies':['read',]},
}
print(id(info)) #2208947566400
print(id(info['alex']['hobbies'])) #2208949682432
info['alex']['hobbies'].append('play') # 给alex追加play的爱好
print(info)
print(id(info)) #2208947566400
print(id(info['alex']['hobbies'])) #2208949682432